Zosia has had two memorable roles in hit TV series in the past few years: first as Joyce, Peggy Olson’s sardonic lesbian pal in Mad Men; then as Shoshanna, the pink-wearing, NYU-attending, Sex and the City-watching Jewish American virgin in Girls. Both characters consort with New York hipsters at coffee houses and warehouse parties; the difference between them is half a century. ‘Cool kids are always cool kids,’ says Zosia, ‘but the Girls generation is super-nostalgic: the clothes, the music, the literature. We’re almost sad we’re not living in the era of Mad Men, because the world was circumstantially more fascinating then. A crazy war, students protesting, the civil rights struggle. I think the kids of my generation would like something more tangible to push against.’